Which theory of aging states that unstable oxygen molecules tend to steal electrons as they bounce around, thus causing damage to surrounding cells?

A) cellular-clock theory
B) wear-and-tear theory
C) free-radical theory
D) activity theory

Free-Radical Theory

An idea that posits the aging process in organisms is a result of cells accumulating damage from free radicals over time.

Unstable Oxygen Molecules

Often referred to as free radicals, these are molecules with unpaired electrons that can cause oxidative damage to cells and tissues.